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#13
01-03-2018, 12:03 PM
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Inject video after the video detector diode. The sound-synch amp V6A is really just part of the AGC circuit. Zenith tied the AGC and synch sep circuits together in one tube V7A, and they interact a bit, but the sync sep should work fine without the AGC system... The idea of tying the AGC to the sync in that manner was to throttle the IF gain and seperator threshold in such a way as to achieve best sync on snowy deep fringe reception...Injecting video makes all of the AGC system meaningless.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 
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